American International Group was the largest insurance company in the US_______i

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American International Group was the largest insurance company in the US_______it, suddenly closed down in September 2008.

A．after

B．since

C．as

D．before

答案

解析

略

举一反三

Shanghai celebrated____one year countdown (倒计时) to the opening of___2010 World Expo on May 1, 2009.

A．the ;/

B．a; the

C．the; the

D．an; the

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26．— What’s up. Lucy?
　 — ________.

A．I’m terribly sorry.	B．I’ve met an old friend of mine.
C．It’s over there.	D．It’s very nice of you

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It"s difficult to _______a conversation with someone who only says “yes” and “no”.

A．put up

B．pick up

C．keep up

D．live up

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As a teacher, I seldom give my students so difficult a problem ________ they can not work out.

A．that

B．if

C．in order that

D．as

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________ him before, I didn"t recognize him.

A．Having never seen　　

B．Never seeing

C．Not seeing　

D．Having not seen

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